40210121 has 8 divisors (see below), whose sum is σ = 45993024. Its totient is φ = 34436880.

The previous prime is 40210109. The next prime is 40210133. The reversal of 40210121 is 12101204.

40210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40210109) and next prime (40210133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40210121 is a prime.

It is a super-3 number, since 3×40210121³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40210721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13646 + ... + 16328.

It is an arithmetic number, because the mean of its divisors is an integer number (5749128).

Almost surely, 2^40210121 is an apocalyptic number.

It is an amenable number.

40210121 is a deficient number, since it is larger than the sum of its proper divisors (5782903).

40210121 is a wasteful number, since it uses less digits than its factorization.

40210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 40210121 is about 6341.1450858658. The cubic root of 40210121 is about 342.5929802437.

Adding to 40210121 its reverse (12101204), we get a palindrome (52311325).

The spelling of 40210121 in words is "forty million, two hundred ten thousand, one hundred twenty-one".